This may not be new but still pretty neat. Mitsubishi Electric recently announced a new interface in Japan that allows for blind users to select their destination floor by voice, with a subsequent announcement when they arrive. Additionally, the system kicks in whenever it detects a wheelchair, replacing the potentially difficult process of reaching high buttons with the simple act of speaking. No word on whether the system works in English just yet, but you might want to brush up on your Japanese either way.
This reminds me of this pretty funny clip from a Scottish television show. Please note there are a few off color humor references so watch with care.